1. Which is Longest road tunnel in the World ?

Answer: Lærdal Tunnel (Norway - 24.51 kilometre)

2. Which is the largest gulf ?

Answer: Gulf of Mexico

3. Which is tallest statue in world ?

Answer:

Spring Temple Buddha located in the Zhaocun township of Lushan County, Henan, China

4. What is the name of brightest star ?

Answer: Sirius

5. Which is Largest Dome in World ?

Answer: St. Peter's Basilica (Rome)

6. Which is the longest wall in world ?

Answer: Great wall of China

7. Which is the lightest metal ?

Answer: Lithium